<template>
    <div class="star" :class="starType">
        <span v-for="itemClass in itemClasses" :key="itemClass.id" :class="itemClass" class="star-item"></span>
    </div>
</template>

<script>
var LENGTH = 5
var CLS_ON = 'on'
var CLS_HALF = 'half'
var CLS_OFF = 'off'

export default {
    props:{
        size: {
            type: Number
        },
        score: {
            type: Number
        }
    },
    computed: {
            starType(){
                return 'star-' + this.size
            },
            itemClasses(){
                var result = []
                var score = Math.floor(this.score*2)/2
                var hasDecimal = score % 1 !== 0
                var intger = Math.floor(score)
                for(var i=0;i<intger;i++){
                    result.push(CLS_ON)
                }
                if(hasDecimal){
                    result.push(CLS_HALF)
                }
                while(result.length < LENGTH){
                    result.push(CLS_OFF)
                }
                return result
            }
        },
}
</script>

<style lang="stylus" rel="stylesheet/stylus">
    @import "../../common/stylus/mixin.styl"

    .star
        font-size: 0
        .star-item
            display: inline-block
            background-repeat: no-repeat
        &.star-48
            .star-item
                width: 20px
                height: 20px
                margin-right: 22px
                background-size: 20px 20px
                &:last-child
                    margin-right: 0
                &.on
                    bg-image('star48_on')
                &.half
                    bg-image('star48_half')
                &.off
                    bg-image('star48_off')
        &.star-36
            .star-item
                width: 15px
                height: 15px
                margin-right: 6px
                background-size: 15px 15px
                &:last-child
                    margin-right: 0
                &.on
                    bg-image('star36_on')
                &.half
                    bg-image('star36_half')
                &.off
                    bg-image('star36_off')
        &.star-24
            .star-item
                width: 10px
                height: 10px
                margin-right: 3px
                background-size: 10px 10px
                &:last-child
                    margin-right: 0
                &.on
                    bg-image('star24_on')
                &.half
                    bg-image('star24_half')
                &.off
                    bg-image('star24_off')
</style>